Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2005-12-20
2005-12-20
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C320S134000
Reexamination Certificate
active
06977513
ABSTRACT:
A bidirectional main switch includes two main switches M1and M2formed of two main MOSFET'S Q1and Q2, respectively; a bidirectional mirror switch including two mirror switches M3and M4formed of two mirror MOSFET'S Q3and Q4, respectively, both being formed so as to allow a small current (a mirror current) to flow therein in a specified ratio to a current in the main MOSFET'S Q1and Q2; and an operational amplifier Op1forming feed back amplifying circuit having power supplied from two power sources. Thus, a bidirectional current flowing in the bidirectional main switch for cutting off an excessive charge current and an excessive discharge current of a battery E can be detected by a simple circuit with low power losses and a high accuracy.
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Deb Anjan
Fuji Electric Holdings Co., Ltd.
Nguyen Hoai-An D.
Rabin & Rabin, P.C.
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